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SUMMARY:Phase transitions in non-Abelian string nets - Julien Vidal\, CNRS
 \, LPTMC Paris
DTSTART:20150521T124500Z
DTEND:20150521T134500Z
UID:TALK58589@talks.cam.ac.uk
CONTACT:Dr G Moller
DESCRIPTION:Phase transitions in topologically ordered systems remain a wi
 dely unexplored domain mainly due to the lack of theoretical tools to anal
 yze them. In the absence of effective field theory\, microscopic models ar
 e important to investigate the possible condensation mechanisms driving tr
 ansitions. In this context\, the string-net model introduced ten years ago
  by M. Levin and X.-G. Wen is especially attractive since it allows to stu
 dy any (doubled achiral) topological phase. In the absence of perturbation
 \, string-net condensates can be seen as deconfined phases in which excita
 tions are anyons. In this talk\, I will discuss the influence of a string 
 tension in non-Abelian string-net models and I will show that it leads to 
 phase transitions which depend on the anyon theory considered. I will also
  address the issue of anyonic bound states that may be generated by this s
 tring tension and their possible relevance to understand the nature of the
  phase transitions.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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